The moderator that best fits the above criteria is ...

A triumverate; deGrasse Tyson, Flatow and Alda.

Sorry, it just occurred to me that a triangle defense against the offense of the political establishment would be a good thing. I saw those three names mentioned together in previous posts, and it just hit me: have a trio of moderators to get a more nuanced questioning of the candidates.

I like the team approach, but a debate with this team would not happen. While each has merit, as a group they would be perceived as leaning heavily left. Why would any Republican agree?

I want to see either a real debate or, if a nominee refuses, I want it clear to the full electorate that they refused to discuss science - without being able to claim that the format was a partisan ambush.